Electrothermic ventilator.



PATENTED DEC. l, 1903.

F. DE MARE.

ELEGTROTHERMIG VENTILATOR.

No MODEL.

APPLIOATION FILED JUNE 16, 1902.

2 SHEETS-SHEET 1.

Z5" neffef.' @wf de m No. 745,507. PATBNTBD DBG. 1, 190s.

P. DE MARE.

BLBGTROTHBRMIG VENTILATOR.

APPLICATION FILED JUNE 1'6, 1902.

N0 MODEL. 2 SHEETS-SHEET,2.

UNITED STATES Patented December 1, 1903.

PATENT GEEICE.

ELEGTRGTHERMlC VENTILATR.

sPEcIFIcA'rIoN formi-fig part of Lette-fs Pate-11e No. 745,507, dated necesitar 1, 190s.

Application filed June 16,1902. Serial No. 111,981.

(No model.)

To a/ZZ whom, it may concern.-

Be it known that I, FREDERIC DE MARE, a citizen of the French Republic, and a resident of Brussels, Belgium, have invented certain new and useful Improvements in Electrothermic Fans, of which the following is a specication.

To obtain in a therrnic apparatus all the results to which it is susceptible if it is destined to heat the air in an inclosure, it is necessary by mechanical means to renew the air surrounding the apparatus. The changes oi' temperature between a gas and a solid take place too slowly if the difference in density of heated gas is alone in question, and as, in order to avoid the radiation, endeavors are made to restrain the movement of gases, so to increase this radiation their motion must be increased.

My invention has for its object an apparatus which while thoroughly warming the air will keep it in free circulation without producing a blast such as caused by the ventilating-blowers of the present day; and it consists in the employmentof a casing inclosing heating-Wires, into which casing the air is taken, stirred, circulated, and finally discharged at the temperature desired, all as hereinafter described with reference to the i accompanying` drawings, in whicl Figure 1 is a vertical section, transverse of the axis, of the preferred forni of my appathe spout or nozzle, the evolute of which is the circle described by the fan-blades g. The 4o space between said circle and the peripheral wall of the chamber receives a correspondlingly-shaped resistance-frame composed of two horn-shaped side plates c2 e3, connected by bolts d2, which also serve to hold the lateral caps of the casing in place, and having insulator-sleeves d3, over which the wire is carried rst to one end, then back to the other and return until all the grooves in the insulators are taken up, and finally to the positive and negative terminals.

The operation of this device is as follows: The fan being driven in any convenient manner creates a current of air through the casing which passes in contact with the wires. A current of electricity is simultaneously sent through the wires, thereby heating the same, and consequentlyheating the air passing over them.

What I claim, and desire to secure by Letters Patent, is

In an electric-heating apparatus, the combination of a fan-casing, a fan eccentrically mounted in said casing, thermic wires adapted to receive a current of electricity, supported on insulating-sleeves connecting between the walls of said fan, and adapted to heat the air driven through said casing, by said fan.

In testimony whereof I have set my hand ratus; and Fig. 2 is a perspective view of the l in presence of two witnesses.

resistance-frame of said apparatus detached. I prefer to use a wing-fan with the construction indicated in Figs. 1 and 2, wherein the perimeter of the fan-chamber is described upon the evolvent of a circle terminating in FREDERIC DE MARE.

Witnesses:

C. GEES, GREGORY PHELAN. 

